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pro vyhledávání: '"Christian M. Chilan"'
Autor:
Christian M. Chilan, Bruce A. Conway
Publikováno v:
Journal of Guidance, Control, and Dynamics. 43:30-38
The optimal control of nonlinear systems is traditionally obtained by the application of the Pontryagin minimum principle. Despite the success of this methodology in finding the optimal control for...
Autor:
Oscar S. Alvarez-Salazar, Daniel R. Herber, Soon-Jo Chung, Jack Aldrich, James T. Allison, Christian M. Chilan, Yashwanth Kumar Nakka
Publikováno v:
AIAA Journal. 55:3180-3195
This work presents a novel spacecraft attitude control architecture using strain-actuated solar arrays that does not require the use of conventional attitude control hardware. A strain-actuated solar array enables attitude slewing maneuvers and preci
Autor:
Christian M. Chilan, Bruce A. Conway
Publikováno v:
Journal of Optimization Theory and Applications. 167:161-194
Few sophisticated problems in the optimal control of a dynamical system can be solved analytically. There are many numerical solution methods, but most, especially those with the most potential accuracy, work iteratively and must be initialized with
Autor:
Bruce A. Conway, Christian M. Chilan
Publikováno v:
Journal of Guidance, Control, and Dynamics. 36:1410-1424
A modern space mission is assembled from multiple phases or events such as impulsive maneuvers, coast arcs, thrust arcs, and planetary flybys. Traditionally, a mission planner would resort to intuition and experience to develop a sequence of events f
Autor:
Francesca Baldini, Soon-Jo Chung, Saptarshi Bandyopadhyay, Jean-Pierre de la Croix, Christian M. Chilan, Amir Rahmani, Fred Y. Hadaegh, Rebecca Foust, Alexandra Bacula
Publikováno v:
AIAA/AAS Astrodynamics Specialist Conference.
In this paper, we develop a novel algorithm for spacecraft trajectory planning in an environment cluttered with many geometrically-fixed obstacles. The Spherical Expansion and Sequential Convex Programming (SE-SCP) algorithm first uses a spherical-ex
Publikováno v:
Celestial Mechanics and Dynamical Astronomy. 97:73-86
The space mission planning process is considered as a hybrid optimal control problem. Hybrid optimal control problems are problems that include categorical variables in the problem formulation. For example, an interplanetary trajectory may consist of
Autor:
Bruce A. Conway, Christian M. Chilan
Publikováno v:
IEEE Congress on Evolutionary Computation
Many interesting problems in numerical optimization are hybrid optimal control problems. Hybrid optimal control (HOC) problems include both continuous-valued variables and categorical variables in the problem formulation. For the types of problems en